Machine for making separable fastener studs



3 Sheets-Sheet l M. F. CARR I MACHINE FOR MAKING SEPARABLE FASTENER STUDS Original Fil'd Nov. 1, 1924 I #0 M r 8 9 B m 8 7 m 6 7 M; M/\ J i v 6 WJ/\\\ a n a 8 w w M April 30, 1929- April 30, 1929. F, CARR 1,711,455

MACHINE FOR MAKING SEPARABLE FASTENER STUDS Original Filed Nov 1, 1924 3 Sheets-Sheet 3 E5; ..10. 123; .11. 17 .1 E69 E6 ee U U IW/venF/ OI": M0 5 e s FO'QWW,

elevation, through a portion-wot :a-.machine.- v I :'V1d6d=111- advancexpf the;neck.;: *1 1 1, The only ,parts; of-my multiple- Patented Apr. 30, 1929.

Mi ht- I FATE NT orrlcn,

"MosEs cane, for f Iiiikinerolt, ffmnss'nonusnrirsf rs mme, is? 5 11mm? Assign- FENTSQWVABF'. EFERQ QWW Z EEBAHQ 13 A 5 maonmn ro'n "Margins sEPARABnn flri g'inal'rappl ication.filed Noveinberfl, 1924,?

- This-invention aims ,to provide,$an.-improved machine for 3 making separable; diastener studs.-= '5 The application is a division of-my prior application, ,Seriali No. vember.l,1924l; i l I In the drawings, whichxillustrateia -pre= tel-red embodiment of my invention Figure 1 is a vertical section,-partly-1iin in-which the studs are tormed'y 'ii .--=3' Fig. 2 is a fragmentary; section, partly-in elevation, showingg oneof the forming dies of the machine in position torwforming-the shoulder on the stud;":'/ s uh-:2

Fig; 2 isa fragmentary:elex'ration:view

of a portionof the bumpingl mechanism,

-.are i formedi'w 1 and th'e'camsfor operating thedsamey Fi 3 is an enlarged section on the line 3-3 of Fig.2;

Fig; 4 is an enlarged tragmentary 'view2 Fig. 5 is a view of zthe'parts ShOWILIiIl machine. ilTheldie may be of any suitable construction 3 for compressing a neck in; the studtand bumping a shoulder between the.

Fig. 4, showing the method Figa- 6 "shows the relation 'of the gpartsg shown in Fig. 4, when forming theshoulder -d1e or ch,uck,6; (F1gs.'1'through;9), which on the stud;

Fig; '7 is a'view of the'parts as shown in Fig.4, but showing the stud being-e ected I gersf'l'presentingijaws -7 for laterally com-- from the die;" v Fig. 8 is a side elevation of :the chuck; Fig. 9 is a plan view-of thetchuckp 1 Divided-end this: application filed .in usual 3 methods "of making a stud i of the samegeneral type, butu-I then utilize a 7 preferred novel, method of forming the neck and shoulder-of the'stud-by special series 747,231, 'filed 'No- :1: v :ChlIlB as that innvhich the-necklessstud is of operations; preferably in: the same =mav.eration lWhlChqWGflkGIIS thetstud, particularly" where l .a relatively abrupt shoulder. -is i propress .or

-eye1et machine which I? have illustrated are those 1 parts: necessary .=for a complete under-- standin'g; zof-t imy invention, I and therefore ;Fig, 1, as-jiillustrated,shows only-the means by {whichthenec'k and shoulderiof-the 'stud The,..-appa1?atus forming the shoulderrin'ithe neckless stud comprises a stud carrying" plunger; 1, 1 which may be opheratedi by- 1 any suitable 311163.118, such, I for anqstanceyas by1the-ca'ms2 and 3 located upon the shaft 4, which raise and'lowerthe ,,plunger so as to deliver a neckless'shell to theforming dielocated:inthe-bed 5 of "the head :and neckQbut I prefer to provide a is' formed ii'roma single piece-10f metal slotted to provide a -p1urality of spring 'finrpressing (a neck in the previouslywne'ckless Sh81lml7The chuckv'fi -is-also-provided with Figs. 10 through 15 are viewsshowingprogressive stages in the drawing or pressing of the stud; and

Fig. 16 is a sectional view of:thecom-- chuck is also hollowcdrto permit passage tions. The drawings illustrate the various positions of the neck forniingportions-of the machine during the neck andshoulder' -fornnng operations, and the variousiforms that the single piece-of metal is pressed into until it has become a completed stud. '1'

In carrying out my invention, I-first form a neckless-shell- (Figs-13) substantially as tapered portions 48 iat the upper ends of the tspring-fingers which cooperate with the 'cam 1 piece 9 to force the jaws inwardly during lateral coI'np'ressionv-of the neck, and: the

within thechuck-of the bumpingtmechanism for; forming the shoulder-on-the stud. This .fbumping mechanism comprises (Figzrwl) a% sleeve 10 surrounding. a stud ejecting plunger 11 andpresenting arecess 12 for-receiving the head ofntheustud'during the bumping-operation; Themea'ns for operatingthe' bumping mechanism-and the ejecting: plunger-1151 comprise a -eaml3 (Figsrfi uand 2) for 'inoving the isle-eve 310 I and plunger 11 toward the-stud-asf'a unit, andthe cam l l'which operates only upon the plunger to ejectrthe stud from the die,- both the m r-131mm r 4; ssr a bath h ft-115 s The bumping and eject-ing mechanism, as

shown ,inFigs, land 2, is mounted in the bedpfi-iofi fiheimachine and the sleeve/.10 is" carriedby'a'plunger'w which is operated by the cam 13 to :unove the sleeve int-oriengagement with the head of the stud, as more .fully 'hereinafter described. The plunger 16 is held in the bed 5 by a spring-pressed pin 17, which cooperates-with a slot 18 in the'iplunger and also acts as a stop to limit the movement of the sleeve '10 during the bumpingoperation. The ejecting plunger lli'm'ay be made from .asingle piece of which may be' accurately. ground to pro- =-vide the desired adjustment for the plunger.

Thus, after the top .or bottom of the plunger :ifhas become "worn,- the substitution of a movement imechamsm.

slightly longer spacer 19 will effect a quick wandeconomical nepai-r;- lhe'plun'ger 11 is maintained in the proper relation to the sleeve": 10 and plunger 16 by a setscrew 20 screwed-iintothe plunger 16 (Figs. 1 and 2) and cooperating with a slot 21 in the lower zpartbf'the ejecting'plunger 11 to limit the thereof relative to the rest of the Havingt-hus described the relevant parts of the preferred machine,- I will now de- Scribe the specific operation of the parts of :the apparatus illustrated in practising the preferred method 10f forming the neck and shoulder of the stud, which is best illuspasses through. a second-aperture in a movtrated in Figs 4 through 7. A neckless shell comprising ashank 24 and a base 26 is first'carried downwardly by the plunger 1 toward the die or chuck 6 and through a die retaining plate 22 held in place by screws or pins' '23.' Then the shank 24 of a the shell able disc 25 seated upon the upper end of the chuck, as best illustrated in Fig. 4. As 'the'shell is carried downward, the base per-- tion 26 thereof seats against the disc 25 and .furtherdownwa'rd movement of the plunger 1 forces'the disc downwardly, in turn forcing the dieor chuck downwardly, thereby -moving the :chuck relative to the cam piece 9. This movement of the chuck, therefore, forces thefispring jaws-'7 'of the chuck inwardly against the shank thereby to laterally compress indentations 27 in the shank 24 of the shell, which has previously passed between the jaws. Thus, as illustrated in, Fig. 5, the neck is formed in the stud and a plurality of reinforcing ribs or struts 28, being the metal squeezed in the slots between thefja-w's, form supports *conneeti n grtlie head 29 of the-stud with thesh'ank 24; This provides a stud head having a relat-ivelysloping shoulder rearwardly .the1;eof ,form ing ,the

front wall of the. hedges-shown ,injgigi '14. WVhile the jaws 7 stillen'gag'e thestiid and the plunger 1 baclcsuppoits the stud, the cam 13 moves the sleeve 10 and ejecting plunger 11- quickly toward the head of the stud and strikes it a sharp blow (Fig. 6), which however is limited in its movement as described,'so as to'inove the'head toward the shank of the stud and=orm, from the previously relatively sloping shoulder :(Fig. 14'), a relatively abru tlshoulder '30rbetween the head and neck 0- stud, as best illustrated in Fig. 14. During-the v last 'mentioned operation, the head iofthe-stud enters the recess in the sleeve 10 so as =to retain its shape duringthe bumping operation, and

the struts spaced about the neck oppose col lapsing of the neck; The final :operation includes withdrawal of the-sleeve. 10 from the head of the studpupwzirdzinovement of the plunger 1, thereby'releasing the jaws '7 from engagement withthe-studmndhfinally ejecting the stud from the dye by upward movement of the ejecting plunger llfCflllSBd by rotation ofathe cam l has best illustrated inFig/Z."

The stud is delivered from thea abov e men t-ioned operations withthe struts 28still intact, as best shown in 'F ig.'li, .and1these struts are preferably removed byplacing the studs into a rolling de'vice whichichips or rolls the struts 28 from the periphery of'theneck and produces astud in which-athe'walls of the neck, the shoulder and-'therliead thereof are substantially as thickastheremaining portions ofthe'stud', as bestishown in Fig. 16. This method of pressing themneck' and shoulder of the :st-ud, ratherthan roll-ing it, produces a stud which is more durable and is a more desirable productthan a-stud having merely a irolled neck. liHeretofore, it has been the practice to fill the whole-head and neck portions of .a. r'olledstud'with as'ol'der, which, in a measure, anneals the brass, where unduly hardened by the rolling action, and strengthens the stud. "When studs aremade by my improved method, this soldering 0poration isunnecessary. Thus my improved stud is strong and durable in construction and can be manufactured lessexpensively and more quickly than the rolled and sol-- dered reinforced stud heretofore produced,

While I have shown and described: one embodiment of my invention, it will be understood that I have done so for purposes of clarification and not .of' limitation, my invention being best defined in theappended claims.

Claims: 1 z :71 1. A stud forming machine including studcarrying means for receiving and holding a neckless shell, chuck means for laterally compressing a neck in the shell, and means for bumping a shoulder adjacent the neck after said chuck means has formed the neck therein.

2. A stud forming machine including studcarrying means for receiving and holding a neckless shell, chuck means for laterally compressing a neck in the shell, and means for bumping a shoulder adjacent the neck after the said chuckmeans has formed the neck therein while said chuck means is still engaged with the shell.

3. A stud forming machine including studcarrying means for receiving and holding a neckless stud, laterally movable neckforming means for pressing a plurality of depressions in the neckless stud and bumping means for forming the head and shoulder on the shell after the depressions are formed in the shell.

4. A machine for makingfastener studs comprising stud-carrying means adapted to receive and hold a neckless stud, a die having a plurality of movable jaws, means for moving said stud-carrying means toward said die, means whereby said jaws are moved into engagement with the neckless stud carried by said stud-carrying means to form a neck in the neckless stud and means to make more abrupt the outer shoulder on the stud resulting from the forming of the neck.

5. A machine for making fastener studs comprising stud-carrying means adapted to receive and hold a neckless stud, a die having a plurality of movable jaws, means for moving said stud-carrying means toward said die, means whereby said jaws are moved into engagement with the neckless stud carried by said stud-carrying means to form a neck in the neckless stud and means operable while said jaws are engaged with the stud tomake more abrupt the outer shoulder on the stud resulting from the forming of the neck.

6. A machine for making fastener studs comprising stud-carrying means adapted to receive a neckless stud, a die having a plurality of movable jaws, means for moving said stud-carrying means toward said die, means whereby said jaws are moved into engagement with the neckless stud carried by said studcarrying means to form a neck in the neckless stud, means operable while said jaws are engaged with the stud to make more abrupt the outer shoulder on the stud resulting from the forming of the neck, and ejecting means movable independently of said jaws for ejecting the stud from the die after said jaws have been retracted to their normal position.

7. A machine for making hollow pressed studs comprising, in combination, a studcarrying plunger for receiving a hollow neckless stud, a chuck presenting a plurality of resilient jaws, means for moving said plunger toward said jaws thereby to move said chuck relative to a cam for moving said resilient jaws toward each other and forming a longitudinally ribbed and therefore reinforced neck in the neckless shell, and an independently acting bumping mechanism presenting a recess for receiving the head of the stud when said bumping mechanism is moved toward said stud to bump a relatively abrupt shoulder between the head and neck of the stud.

8. A machine for making hollow pressed studs comprising, in combination, a movable chuck presenting a plurality of resilient fingers havin neck-forming jaws at the free ends thereo a plunger for delivering a stud to said chuck means whereby movement of said plunger toward said chuck moves said jaws toward each other, bumping means operable toward said jaws while said jaws are urged toward each other and an adjustable ejecting plunger operable to pass between said jaws when released to their normal position for ejecting a stud from said chuck.

9. A machine for making hollow pressed studs comprising, in combination, a chuck member having a plurality of fingers presenting jaw portions, a part for imparting inward neck-forming movement to said fingers, a head-bumping part, and a relatively timed mechanism imparting initial neckforming movement between said fingers and Said head-bumping part and a subsequent movement of said head-bumping part relative to said fingers.

10. A machine for making hollow pressed studs comprising, in combination, a chuck member having a plurality of fingers presenting jaw portions, a part for imparting inward neck-forming movement to said fingers, a head-bumping part, a relatively timed mechanism imparting initial neckforming movement between said fingers and said head-bumping part. and a subsequent movement of said head-bumping part relative to said fingers and an ejecting member for ejecting the stud from the chuck after the neck has been compressed in a neckless shell and a head bumped thereon.

In testimony whereof, I have signed my name to this specification.

MOSES r. CARR 

